X-Git-Url: http://git.liburcu.org/?p=lttng-modules.git;a=blobdiff_plain;f=lttng-context-prio.c;h=b5d21e7e9438bafee3779d483532745f1ec1e65b;hp=9da51a22d983312d02a0b7d48e18734215d3a3b3;hb=HEAD;hpb=79150a4903b5f31695fcd1d9655555ba6dc4bfa4 diff --git a/lttng-context-prio.c b/lttng-context-prio.c deleted file mode 100644 index 9da51a22..00000000 --- a/lttng-context-prio.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * lttng-context-prio.c - * - * LTTng priority context. - * - * Copyright (C) 2009-2012 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include "lttng-events.h" -#include "wrapper/ringbuffer/frontend_types.h" -#include "wrapper/vmalloc.h" -#include "wrapper/kallsyms.h" -#include "lttng-tracer.h" - -static -int (*wrapper_task_prio_sym)(struct task_struct *t); - -int wrapper_task_prio_init(void) -{ - wrapper_task_prio_sym = (void *) kallsyms_lookup_funcptr("task_prio"); - if (!wrapper_task_prio_sym) { - printk(KERN_WARNING "LTTng: task_prio symbol lookup failed.\n"); - return -EINVAL; - } - return 0; -} - -static -size_t prio_get_size(size_t offset) -{ - size_t size = 0; - - size += lib_ring_buffer_align(offset, lttng_alignof(int)); - size += sizeof(int); - return size; -} - -static -void prio_record(struct lttng_ctx_field *field, - struct lib_ring_buffer_ctx *ctx, - struct lttng_channel *chan) -{ - int prio; - - prio = wrapper_task_prio_sym(current); - lib_ring_buffer_align_ctx(ctx, lttng_alignof(prio)); - chan->ops->event_write(ctx, &prio, sizeof(prio)); -} - -static -void prio_get_value(struct lttng_ctx_field *field, - struct lttng_probe_ctx *lttng_probe_ctx, - union lttng_ctx_value *value) -{ - value->s64 = wrapper_task_prio_sym(current); -} - -int lttng_add_prio_to_ctx(struct lttng_ctx **ctx) -{ - struct lttng_ctx_field *field; - int ret; - - if (!wrapper_task_prio_sym) { - ret = wrapper_task_prio_init(); - if (ret) - return ret; - } - - field = lttng_append_context(ctx); - if (!field) - return -ENOMEM; - if (lttng_find_context(*ctx, "prio")) { - lttng_remove_context_field(ctx, field); - return -EEXIST; - } - field->event_field.name = "prio"; - field->event_field.type.atype = atype_integer; - field->event_field.type.u.basic.integer.size = sizeof(int) * CHAR_BIT; - field->event_field.type.u.basic.integer.alignment = lttng_alignof(int) * CHAR_BIT; - field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(int); - field->event_field.type.u.basic.integer.reverse_byte_order = 0; - field->event_field.type.u.basic.integer.base = 10; - field->event_field.type.u.basic.integer.encoding = lttng_encode_none; - field->get_size = prio_get_size; - field->record = prio_record; - field->get_value = prio_get_value; - lttng_context_update(*ctx); - wrapper_vmalloc_sync_all(); - return 0; -} -EXPORT_SYMBOL_GPL(lttng_add_prio_to_ctx); - -MODULE_LICENSE("GPL and additional rights"); -MODULE_AUTHOR("Mathieu Desnoyers"); -MODULE_DESCRIPTION("Linux Trace Toolkit Priority Context"); -MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." - __stringify(LTTNG_MODULES_MINOR_VERSION) "." - __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) - LTTNG_MODULES_EXTRAVERSION);